. >> reporter: for now the ntsb and fire crew airport is waiting for the coroner to determine the cause of death. deat >> as of this time because we have not established thosehose facts, we cannot answer your question. >> reporter: federal investigators are very rude the surveillance rid t video to seef of the victims was run over byey an emergency vehicle, but it's inconclusive. jennifer davis, fox news. >>> tonight egypt is plungingpli further into chaos after clashel between the muslim brotherhood and the military that toppled the democratically elected president. either side is watching and urging calm.. we are there with the latest. >> reporter: deeper and darker battle lines emerge in in egypt as the muslim battle hood calls on the to call on military as they removed morsi from power. this after, clashes between soldiers in kiro, the cairo, iss attacked the building, at least if i are dead50 are dead, repore than 300 injured.00 >> i don't think the muslim brotherhood armed with thistics, and stones is going to be any ay match for the egyptian army.my. what i'm worried is that they